/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.grails.dev.support

import groovy.transform.CompileStatic

import org.slf4j.LoggerFactory

import org.springframework.context.ApplicationContext
import org.springframework.context.ApplicationContextAware
import org.springframework.context.ConfigurableApplicationContext

/**
 * Registers a shutdown hook to close the application context when CTRL+C is hit in dev mode.
 *
 * @author Graeme Rocher
 * @since 1.1.1
 */
class DevelopmentShutdownHook implements ApplicationContextAware {

    public static final String INSTALLED = 'grails.shutdown.hook.installed'

    @CompileStatic
    void setApplicationContext(ApplicationContext applicationContext) {
        if (Boolean.getBoolean(INSTALLED)) {
            return
        }

        Runtime.runtime.addShutdownHook {
            try {
                Thread.start {
                    ((ConfigurableApplicationContext) applicationContext).close()
                }.join(2000)
            } catch (Throwable e) {
                LoggerFactory.getLogger(DevelopmentShutdownHook).warn("Error shutting down application: ${e.message}", e)
            }
        }

        System.setProperty(INSTALLED, 'true')
    }
}
